:root {
    --primary: #8b5cf6;
    --primary-hover: #7c3aed;
    --secondary: #06b6d4;
    --bg: #0f172a;
    --card-bg: #1e293b;
    --text: #f8fafc;
    --text-muted: #94a3b8;
    --border: #334155;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    
    --mana-w: #fdf6aa;
    --mana-u: #3b82f6;
    --mana-b: #a3a3a3;
    --mana-r: #ef4444;
    --mana-g: #22c55e;
    --mana-c: #cbd5e1;
}

* { box-sizing: border-box; }

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg);
    color: var(--text);
    margin: 0;
    padding: 20px;
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
}

header {
    text-align: center;
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border);
}

h1 { margin: 0; font-size: 2.5rem; background: linear-gradient(to right, #ef4444, #a855f7, #3b82f6); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
p { color: var(--text-muted); margin-top: 5px; }

/* Controls */
.controls {
    background: var(--card-bg);
    padding: 25px;
    border-radius: 12px;
    margin-bottom: 30px;
    display: grid;
    grid-template-columns: 1fr;
    gap: 25px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.2);
}

@media (min-width: 768px) {
    .controls { grid-template-columns: 1fr 1fr; align-items: start; }
    .full-width { grid-column: 1 / -1; }
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
    background: rgba(255,255,255,0.03);
    padding: 15px;
    border-radius: 8px;
    border: 1px solid rgba(255,255,255,0.05);
}

label {
    font-weight: 600;
    color: var(--text);
    font-size: 0.9rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.value-badge {
    background: var(--primary);
    color: white;
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 0.8rem;
}

/* Color Selector */
.color-selector {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 5px;
}
.mana-checkbox { display: none; }
.mana-label {
    width: 36px; height: 36px;
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-weight: bold; cursor: pointer;
    border: 2px solid #475569;
    color: #1e293b;
    transition: transform 0.1s, border-color 0.2s;
    user-select: none;
}
.mana-label:hover { transform: scale(1.1); }
.mana-checkbox:checked + .mana-label { border-color: white; box-shadow: 0 0 10px rgba(255,255,255,0.3); transform: scale(1.1); }

.mana-w { background: var(--mana-w); }
.mana-u { background: var(--mana-u); color: white; }
.mana-b { background: #1a1a1a; color: white; border-color: #666; }
.mana-r { background: var(--mana-r); color: white; }
.mana-g { background: var(--mana-g); color: white; }
.mana-c { background: var(--mana-c); font-size: 0.8rem; }

.checkbox-wrapper {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.9rem;
    margin-top: 5px;
    cursor: pointer;
}
.checkbox-wrapper input { cursor: pointer; accent-color: var(--secondary); transform: scale(1.2); }

input[type="range"] {
    width: 100%;
    height: 6px;
    background: #475569;
    border-radius: 3px;
    outline: none;
    -webkit-appearance: none;
    cursor: pointer;
}
input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 18px;
    height: 18px;
    background: var(--text);
    border: 2px solid var(--primary);
    border-radius: 50%;
    transition: transform 0.1s;
}
input[type="range"]::-webkit-slider-thumb:hover { transform: scale(1.1); background: var(--primary); }

.btn-group { display: flex; gap: 10px; margin-top: 10px; }

button {
    background-color: var(--primary);
    color: white;
    border: none;
    padding: 14px 24px;
    font-size: 1rem;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.2s;
    flex: 1;
    box-shadow: 0 4px 6px rgba(0,0,0,0.2);
}
button:hover { background-color: var(--primary-hover); transform: translateY(-1px); }
button:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

button.secondary {
    background-color: transparent;
    border: 1px solid var(--border);
    color: var(--text-muted);
    box-shadow: none;
}
button.secondary:hover { border-color: var(--text); color: var(--text); background: rgba(255,255,255,0.05); }

/* Stats & Grid */
.deck-stats {
    text-align: center;
    margin-bottom: 20px;
    font-size: 1rem;
    color: var(--text-muted);
    padding: 10px;
    background: rgba(0,0,0,0.2);
    border-radius: 8px;
    display: none;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 12px;
}

.card {
    background: var(--card-bg);
    border-radius: 8px;
    overflow: hidden;
    position: relative;
    transition: transform 0.2s;
    aspect-ratio: 2.5/3.5;
}
.card:hover { transform: translateY(-4px); z-index: 5; box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.5); }

.card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

/* Tags in Artwork */
.tag {
    position: absolute;
    top: 28px;
    right: 6px;
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.6rem;
    font-weight: bold;
    text-transform: uppercase;
    box-shadow: 0 2px 4px rgba(0,0,0,0.8);
    backdrop-filter: blur(8px);
    z-index: 2;
    border: 1px solid rgba(255,255,255,0.1);
}
.tag.commander { background: rgba(239, 68, 68, 0.85); color: white; }
.tag.game-changer { background: rgba(139, 92, 246, 0.85); color: white; }
.tag.synergy { background: rgba(16, 185, 129, 0.85); color: white; }
.tag.fallback { background: rgba(6, 182, 212, 0.85); color: white; }
.tag.random { background: rgba(245, 158, 11, 0.85); color: white; }
.tag.land-syn { background: rgba(59, 130, 246, 0.85); color: white; } 
.tag.land-basic { background: rgba(71, 85, 105, 0.85); color: white; }

.card-name-overlay {
    position: absolute;
    bottom: 0; left: 0; right: 0;
    background: linear-gradient(transparent, rgba(0,0,0,0.95));
    padding: 24px 8px 8px 8px;
    font-size: 0.75rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    opacity: 0;
    transition: opacity 0.2s;
}
.card:hover .card-name-overlay { opacity: 1; }

/* Loader & Modals */
.loader-container { margin: 20px 0; text-align: center; display: none; }
.loader {
    border: 3px solid #334155;
    border-top: 3px solid var(--primary);
    border-radius: 50%;
    width: 30px; height: 30px;
    animation: spin 1s linear infinite;
    margin: 0 auto 10px auto;
}
@keyframes spin { 0% { transform: rotate(0deg); } 100% { transform: rotate(360deg); } }

.modal-overlay {
    position: fixed; top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.85);
    display: none; justify-content: center; align-items: center; z-index: 1000;
}
.modal {
    background: var(--card-bg); padding: 25px; border-radius: 12px;
    width: 90%; max-width: 600px; border: 1px solid var(--border);
}
textarea {
    width: 100%; height: 250px;
    background: #020617; color: #e2e8f0;
    border: 1px solid var(--border); border-radius: 6px;
    padding: 10px; font-family: monospace; margin: 15px 0;
}